Actually, not being a US citizen might mean you have rather more pressing concerns - like trying to get homosexuality made legal in your country at all.

A good way of doing that is to consider joining Amnesty International, who have a special section devoted to gay/lesbian rights. Amnesty never involve you in issues in your own country: you campaign on behalf of people in jails abroad.

And just as non-US citizens should be *very* concerned about what happens in the States, if only for the knock-on effect abroad, US citizens could consider lending a hand to people who are in rather worse circumstances than they.